I fully understand her thinking and that is some fine looking chow!!!!
I'm the last remaining member of my family (except my wife who is my one true gift from God) and I can hold EVER PHOTO in a stack 1.5 inches tall - I could cry at all the times we should have taken photos and didn't.
I had a brother who died at 21, I have about 2 dozen of him, only a few good ones though and a mish-mash of me and mom, or me and dad, a single photo of the four of us and one single pic of my mom and dad together taken in 1980.
All joking aside, get that camera out for everything, leave memories and pictures for your children and yourself - someday, when the memory isn't as sharp, it may be warming to see a photo that recalls an event that OTHERWISE you can't recall to save your life.
My Mom passed away just 2 weeks ago, because she had always lived with me (48 years of my life) this separation is hurting me daily, Ihave a single short movie on my cell phone of her sitting up, drinking a soda and barely through the noice of the TV I can hear her saying something to me. I'm trying to figure out how to get that to my computer, I cannot email it like photos with my phone, I guess I'll need a blue-tooth dongle - it will be worth it to me to protect that lone film I will always treasure.
Don't mean to bumb anyone out - but I agree with your wife, GET SOME HEADS IN YOUR PHOTOS - faces are everything once they are no longer there to see. Best wishes.